Air-compressor.



J & A. H. HANNA.

AIB. GOMPRESSOB.

APPLICATION FILED 001.29, 1909.

Patented N0v.8, 1910.

IIIIIIIIIilIIIIIIlIIIIIIII H llllllllllllrlllllllllllillillllli rII.

J. & A. H. HANNA.

AIR COMPRESSOR.

ArrLIoATIoN FILED 00T. 29, 190e.

975,233. Patented Noms, 1910.

2 SHEETS-SHEET 2.

A TTOIMIE 78 UNITED sTATEs PATENT oEEToE. f

JOHN IHIANN'Ay AND .AIBER'JP HENRY HANNA, 0F TROY, NEW' YORK.

AiacoMPnEsso'n.

Specication of Letters Patent.

Application led October 29, 1909. Serial No. 525,278.

To all whom it 4may concern:

Be it known that we, JOHN HANNA and ALBERT H. HANNA, both citizens of the United States, and residents of Troy, in the county of Rensselaer and State of New York, have invented a new and Improved `'Air-Compressor, of which the following is a full, clear, and exact description. This invention relates to certain improve-v lation ofthe tires, or for any1` other desired purpose. Our improved pump when so used may be operatively connected to the engine the-regular water-cooling system of the en 1n any suitable manner, there being preferably included in the connections, a sliding gear, clutch or other device, whereby the compressor is thrown out of operation automatically when the air tank has the required pressure, or may be thrown in or out at will when it is desired to inflate the tires. It is .evident that our improved pump may be used for other purposes than the 'compression of air, and might be used in other localities or in other positions than upon a4 motor vehicle. The pump illustrated -is of that type in which there are two cylinders in alinement with each other and having pistons rigidly connected to yether and reciprocated by means disposed' etween the ltwo plstons.

One special object of the invention is lto provide for the delivery ofthe air from both cylinders through a single conduit and the provision of a safety valve for both cylinders, the outlet conduit and the safety valve being interchangeable' in position.

A further object of the invention is to v provide an improved form of jacket and support therefor, for coolingthe separate ,c linders. This jacket may be connected with gine on the automobile or a separate cooling systemma. be used.

I lOther o jects and advantages-of our improved pump may be set :for.th hereinafter and the. novel features particularly pointed out in the claims.

Reference is to be had to the accompanying drawings, forminga part of this specifi- Patented Novfs, 191e. i

erence indicate corresponding parts in bothA the figures, and in which` Flgure 1 is a side elevation of a pump constructed in accordance with our invention; and Fig. 2 is a longitudinal sectionthrough the pump taken in a angles to the plane of'Fig. 1.

Our improved pump 1ncludes two cylinders l0 and 11, in alinement with each other and preferably formed of a single casting. The two cylinders are spaced apart and are both 'integral with the body 12 of the casting. The body is -hollow .and substantially c lindrical, but presents one flat'face wheregy it may be rigidly secured to an suitableform of support 13. In fusing t e pum in a motor vehicle, the support 13 is re erably plane at right the engine base on one side mem er of the chassis. On one side of the body, there is provided an outwardlvextending boss-14;.

-end carries a disk 16, having an-,eccentiically-mounted wrist pin 17. Within thetwo cylinders are two (pistons 18 and v19, having piston rods 2O an 21. Both of the piston rods are connected to a Islotted cross-head' 22, through which the wrist pin 17 extends'.

The slot extends at right angles to the gen` eral direction' of the piston rods and isA of such length that when the shaft 15 and its disk 16 are rotated, the pistons will be reciprocated within the cylinders. vToffacilitatetheinsertion of the cross-head and the disk, and to permit an adjustment of the parts, the body is preferably provided with l.

an opening' 23 in one side thereof. This opemn is normally covered by a removable name ate, so that the body portion is closed '1 and irt or other foreign substance is pre-v vented from gaining access to the working parts.

Each 'cylinder has adetachable cylinder head 24, rigidly secured in place. Eachl cylinder head is 'provided with an'inlet port 25 10oin'the center of the cylinder hea'd, and the port is normally v'closed by a valve 26` in engagement 'with the inner surface-'ofthe 1` head. The portl is'surrounded by an outsign V' Astem 28 extends' out through thisboss and' is surrounded byg a coil spring 29 within the boss and' normally to'holdftheg" wardly-extending vboss 27 and the valve valve against the inner surface of the head to close the port. A reduction in pressure within the cylinder, permits the valve to open inwardly and permits the free admission of air fromy the atmosphere to the'cylinder.

Adjacent one end of the cylinder head, a boss 30 is l'formed with an outlet passage 31 leadingY from the interior of the cylinder and outward radially tothe edge of the head. Vithin theoutlet passage there is provided a valve seat 32 for a check valve 33, which opens outwardly and prevents the return movement of compressed air through the outlet passage to the cylinder. The valve 33` is normally held closed by a suitable spring, the tension of which may be controlled by the screwing of a collar 34 into the outer end of the passage. The two cylinder heads are similar, vone being made right and the otherleft, in'order that`the vertical portions of the two heads may come in the same plane in respect to the axis of the cylinder, and each piston is single-acting, that is, it operates to draw in air while moving toward the opposite cylinder, and operates to compress and deliver the air durin the return movement. 1n order that lon y a single delivery conduit may beeinployed, we provide means within the pump for connecting yond the check valves in said pistons.

Each cylinder at its outer end is provided with an annular flange 35, of a diameter substantially or nearly equal to the diameter of the center body portion of the casting. Each of these flanges is provided with an aperture therethrough, and a pi e 36 connects the two apertures and exten s through annular portions of the body adjacent the inner ends of thetwo cylinders, as is shown particularly in Fig. 2. The pipe is disposed parallel to the two cylinders and is within the outer perimeter of the pump. It is thus protected against injury, and 1s supported not onlyat each end, but also at two intermediate points, that is, adjacent the inner ends of the two cylinders. Each cylinder head is provided with a passage 37 leading from the passage 31 beyond the check valve in the latter and arranged in alinementwith the end of the pipe 36, so that the air after passing the check valve in either cylinder head, may yflow into the pipe 36 Detachably eonnected'withpthe outer end of 'the passage 31 of one of the cylinder heads, is an outlet conduit 38, through which the air from I both cylinders may be delivered tothe inlet valve of the tank or to the inlet valve of the tire ,to be inflated, or to any .other point at which it is desired to employ the compressed air. Detachably connected with the collar 34 on-tlie other cylinder head,

is any suitable forni of safety valve 39, -whereby the pressure within the pipe 36and the two outlet passages bej single cy the delivery conduit 38 may be kept below a predetermined limit. We have lnot shown the details of the safety valve, as any suitable forin of spring-pressed safety lvalve might be employed, and the'valve per se constitutes no portion of our invention.y It is merely essential that this safety valve be so ldesigned that if the pressure wit-hiii the pipe 3G and delivery conduit 38 exceeds the pressure which the tire is designed to stand, or the predetermined pressure ofthe tank, the valve will open and the excess air will escape. The collars 34 being identical, the delivery conduit 3S and thesafetyvalve 39 are intercliangeable, and the conduit may thus` he connected to whichever end of ,the

`cylinder is most convenient, and thefsafety valve may be connected to the other end.

ln using the Ipump for compressing air orv other gas, atI comparatively low pressure, the heat of compression may be readily dissipated by direct radiation to the surrounding atmosphere, but if a higher pressure. 1s desired, it is found advantageous to coolthe cylinders by the use of water jackets. In the pump illustrated, we have provided each cylinder with a jacket 40, formed of a sheet metal tube concentric with the cylinder. the inner end of the cylinder, the body forms an annular ange41, through which the pipe 36 extends, and this flange 1s of substantial y.

'the same diameter as the flange 35. The

sheet metal jacket encircles these two flanges and maybe heated and shrunk on or may be screwed on, as found most desirable. The jacket is limited in its movement in one direction bythe body of the pump, and at its outer end it preferably terminates iush with the outer surface of the flange 35. The cylinder head is made slightly larger.- than the ange 35, so that it engages with the end of the jacket and tends to prevent longitudinal movement of the jacket inthe opposite direction. The ljacket is of the same diameter as the center portion or body of the pump, and thus the ump presents t e appearance of'a inder of uniform diameter. The

pipe 3G extends through the jacket and may thus partially aid in cooling the air, and the jacket serves to conceal and protect the pipe.

Having thus described our invention, we claim as new and desire to secure by Letters Patent:

1. Apurnp having two cylinders in aline-v ment with eachother and each provided with an outwardly-extending flange at .its outer end an intermediate body portion inte, ralv with both of said cylinders and constituting annular flanges at the inner ends lof said cylinders, cylinder heads at the outer ends of said cylinders, an outlet passage in each cylinder head, valves in said outlet passages, and a ipe connecting said outlet as sagesl beyond said valves and extending through said flanges and said body portion.

l cylinders, means intermediate said cylinders for reciprocating the same simultaneously, each of said cylinders having an outwardlyextending flangev adjacent its outer end, a

cylinderl head secured to each flange, an outwardly-extending boss upon each cylinder head, an outwardly-opening automatic. outlet valve within each boss, and a conduit extending lengthwise -of said cylinders and extending through said flanges and communi-V cating with the interior 'ofeach .of said bosses beyond the outlet valve in the latter.

3. A pump having two cylinders in alinement with each other, pistons within said cylinders, means intermediate said cylinders for reciprocating the same simultaneously, each of said cylinders having an outwardlyextendin flange ad'aoent its outer end, a cylinder` ead secure to each ilange, an outwardly-extendin boss upon each cylinder head, an outwar l -opemng automatic outlet valve within each boss, a conduit extending lengthwise of said cylindersand extending through saidv flanges and communicating with the interior of each'of said bosses beyond theoutlet valve in the latter, a delivery conduit connected to one of said bosses, and a safety valve connected to the other boss, said safety valve and said delivery conduit being interchan cable.

4. A ump having two cylin ers in aline- 4 ment with each other, an intermediate .body portion, pistons within said cylinders, means within said body portion for reciprocating said pistons simultaneously in the same direction, a removable c linder head for the outer end of each cy inder, each of said cylinder heads havin an inwardly-opening inlet valve anda disiarge passage, an out- Wardly-opening check valve wlthin said cylinder head for controlling said passage,

said passage having two branches beyond said check valve, a conduit ,supported by said cylinders and independent of said cylinder heads and having its vopposite ends registerin with one branch of each passage when saidg cylinder heads are in place, and a deliver'yconduit ada ted to be connected to the other branch o either of said passages. A

In testimony whereof we have slgned our names to this specification inthe presence f.

of two subscribing witnesses.-

JOHN HANNA. ALBERT HENRY HANN A.

Witnesses:

ALFRED J. NoLIN, FRANK A. SNYDER. 

